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AP Physics 2
14.9 Thin-Film Interference
BeginnerMCQMathematical17.7k
Light incident normally on a thin coating of index \(n_c\) on a glass lens of index \(n_g\).
Light incident normally on a thin coating of index \(n_c\) on a glass lens of index \(n_g\).
A camera lens made of glass with index of refraction \(n_g\) is coated with a thin layer of transparent material with index of refraction \(n_c\), where \(1.0 < n_c < n_g\). Monochromatic light of wavelength \(\lambda\) in air is incident perpendicular to the surface of the coated lens. Which of the following expressions represents the minimum non-zero thickness \(t\) of the coating that minimizes the intensity of the reflected light?

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